Span Failure - Teledyne 3000TA-XL-EU Operating Instructions Manual

Trace Oxygen Analyzer
Press ▲ (<UP>) to permit modification (
Use the arrow keys to enter the oxygen concentration of the span
gas you are using (209000.00 if you are using air). The ◄► arrows
choose the digit, and the ▲▼ arrows choose the value of the digit.
Press Enter to enter the span value into the system and begin the
span calibration.
Once the span has begun, the microprocessor samples the output at
a predetermined rate. It calculates the difference between successive
samplings and displays this difference as a Slope on the screen. It takes
several seconds for the first Slope value to display. Slope indicates the
rate of change of the Span reading. It is a sensitive indicator of stability.
When the Span value displayed on the screen is sufficiently stable,
press Enter. (Generally, when the Span reading changes by 1 % or less
of the full scale of the range being calibrated, for a period of ten minutes
it is sufficiently stable.) Once Enter is pressed, the Span reading
changes to the correct value. The instrument then automatically enters
the Analyze function.

4.4.3 Span Failure

The analyzer checks the output of the cell at the end of the span. If
the raw output of the cell is less than 0.5 μA/ppm O
be accepted. The analyzer will return to the previous calibration values,
trigger the System Alarm, and display the following message on the
VFD:
This message will be shown for five seconds and the instrument
shall return to the Analyze mode. In the upper right hand corner of the
VFD display ― ‖ will be shown. This message flag will help the
FCAL
operator troubleshoot in case calibration was initiated remotely. To
reset the alarm and the flag message, the unit must be turned off by
cycling the standby key
correct.
Teledyne Analytical Instruments
Span Val: 000008.00
<ENT>Span <UP>Mod #
Mod #
#### % Span
Slope=#### ppm/s
Span Failed!!
. It will reset if the next span cycle is
Operation
) of span value.
, the span will not
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